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NTN 558/552A inch series tapered roller bearing, open design with straight bore. Constructed from case carburized steel for durability in moderate-load industrial applications such as gearboxes and axle assemblies.
MODEL 558/552A
$151.34 Each
Prices are subject to change
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Returnable:No
a (Effective Load Center)
-0.3700 in
B (in)
2.3750
Bore Type
Round
Bore type
Round
Cone Number
558
Configuration
One
Cup Number
552A
D (in)
4.8750
Dynamic Load Rating
39000 lbf
Dynamic load rating
39000 lbf
e (Axial Load Factor)
0.35
Enclosure
Open
Lubrication
w/o Oil Hole
Material
Case carburized steel
Operating Temperature Range
-40 to 250 °F
Operating temperature range
-40 to 250 ºF
Precision Rating
Class 4
Precision rating
Class 4
r (in)
0.1300
R (in)
0.09
Static Load Rating
55000 lbf
Static load rating
55000 lbf
Style
Cone & cup
Type
Tapered Roller Bearing
U
2.87 in
V
2.72 in
W
1.5000 in
Wi
1.4440 in
Width
1.5
Wo
1.1875 in
X
4.57 in
Y2 (Axial Load Factor)
1.73
Z
4.29 in
Technical Specifications
Type | Tapered Roller Bearing |
Bore Type | Round |
Material | Case Carburized Steel |
Style | Cone & Cup |
Precision Rating | Class 4 |
Cone Number | 558 |
Cup Number | 552A |
Configuration | One |
Lubrication | w/o Oil Hole |
e (Axial Load Factor) | 0.35 |
Y2 (Axial Load Factor) | 1.73 |
Static Load Rating | 55000 lbf245000 N245.00 kN |
Dynamic Load Rating | 39000 lbf173000 N173.00 kN |
Enclosure | Open |
Operating Temperature Range | -40 to 250 F-40 to 120 C |
Dimensional Specifications
| |
B | 2.3750 in60.325 mm |
D | 4.8750 in123.825 mm |
Wo | 1.1875 in30.163 mm |
Wi | 1.4440 in36.678 mm |
W | 1.5000 in38.100 mm |
r | 0.1300 in3.300 mm |
R | 0.09 in2.3 mm |
a (Effective Load Center) | -0.3700 in-9.400 mm |
U | 2.87 in73.0 mm |
V | 2.72 in69.0 mm |
X | 4.57 in116.0 mm |
Z | 4.29 in109.0 mm |
How do I choose the right type of bearing for my application?
Start with the load and how it’s applied. You need to know if you’re dealing with radial loads, axial loads, or a mix of both. Then look at speed, operating environment, and space constraints. For example, ball bearings are great for high speed and lighter loads, while roller bearings handle heavier loads but usually at lower speeds. If there’s contamination, moisture, or heat involved, you may need sealed bearings or specific materials. In most cases, the right choice comes down to matching load type, speed, and environment to the bearing design.
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